/**
 * Copyright (c) 2014,Egret-Labs.org
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Egret-Labs.org nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY EGRET-LABS.ORG AND CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL EGRET-LABS.ORG AND CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
var egret;
(function (egret) {
    var gui;
    (function (gui) {
        /**
         * @class egret.gui.NumberInterpolator
         * @classdesc
         * NumberInterpolator 类在表示为 number 实例的开始值和结束值之间提供插值。
         * @implements egret.gui.IInterpolator
         */
        var NumberInterpolator = (function () {
            /**
             * @method egret.gui.NumberInterpolator#constructor
             */
            function NumberInterpolator() {
            }
            var __egretProto__ = NumberInterpolator.prototype;
            NumberInterpolator.getInstance = function () {
                if (!NumberInterpolator.theInstance)
                    NumberInterpolator.theInstance = new NumberInterpolator();
                return NumberInterpolator.theInstance;
            };
            __egretProto__.interpolate = function (fraction, startValue, endValue) {
                if (fraction == 0)
                    return startValue;
                else if (fraction == 1)
                    return endValue;
                return startValue + (fraction * (endValue - startValue));
            };
            __egretProto__.increment = function (baseValue, incrementValue) {
                return baseValue + incrementValue;
            };
            __egretProto__.decrement = function (baseValue, decrementValue) {
                return baseValue - decrementValue;
            };
            return NumberInterpolator;
        })();
        gui.NumberInterpolator = NumberInterpolator;
        NumberInterpolator.prototype.__class__ = "egret.gui.NumberInterpolator";
    })(gui = egret.gui || (egret.gui = {}));
})(egret || (egret = {}));
